A man is suspected for burning down a methadone clinic. Someone is arrested after claiming he killed Lem. A porn store owner is beaten up in his store, likely for making porn with grandmothers. Dutch tells Vic that Corrine is worried about him. The Strike Team buries themselves in work. They have an encounter with Moses and talk about Antwon. Tina is studying for her detective's exam. Claudette's start as a captain is rocky.

Vic, Shane and Ronnie are talking to an old Salvadoran man who used to be the leader of a street gang. Kavanaugh turns up the heat on Vic again, which makes Vic take bigger risks to clear his name.

The Department wants publicity pictures of some of the personnel of the Barn. A garage turns out to be a meth lab and a drug store robbery is investigated. Meanwhile, the brother of a suspected cop killer is hauled in for questioning. And Dutch deals with a federal agent related to the Salvadorans.

The Strike Team gets a new member called Kevin. Some ex gang-members are starting a war against other gangs, while they are being hunted down for leaving the gang. There are a lot of murders in the Latino community and Aceveda tries to stop that. There is a shootout at a pizza joint, and Vic tries to save a man who was shot.

A bunch of dead people with false documents are found, possibly as a result of a beef between Mexicans and Salvadorans. Meanwhile, some ex-cops clean out a building filled with a Jamaican dope operation.

Antwon is interrupted during a conjugal visit by another visitor. Meanwhile, a city councilman's daughter is murdered.

A Mexican government official is missing and thought to be dead, and boy is shot at an Salvadoran festival. Plus, a woman is giving information to the Strike Team after she was found in bed with a criminal during a police raid.

A woman is stabbed in a store, but she seems a little out of her own surroundings. Meanwhile, a boy is brought into the Barn by his dad to tell the cops that he witnessed a crime. Plus, Aceveda is meeting with people to help him to further his political career.

Members of a crew that committed the 'San Marcos murders' are being rounded up based on intel from snitches and crew members who talk to save themselves jail time. Homeland Security get involved when a port inspector isn't cooperating with a search of an Armenian shipment coming in.

The Armenians are looking for hit men to kill some cops, and the Strike Team looks to be a target. Plus, a young kid is busted right before he was to kill a Latino man as an initiation ritual into a gang.